Valve gear



n.1. rluou. VALVE GEAR. APPLICATION FILED FEB. I0. 1921. l

l Patendspt 5, 1922.

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III-III. IJ f C. J. PILLIOD.

vALv: GEAR AIPLICATION FILED FEB. l0, 192|.

Patented Sept. 5, 1922.'

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INS/ENTER c. 1. PiLLmn.

- VALVE GEAR.

' l APPucATloN FILED Fumo, m21. 1,427,840, PatentedSept. 5, 1922,.

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Dix/ENTER l, r maar YGHAllfLES J'. PILLIOE'OF TLEDO,' ,01110,y liSSIGrNOR,-'lO DANIELSEARLES,TRUSTE,

i OF-IOLEDOy OHIO.. C i l f verantA GEAR To @ZZ wlw/m it mag/concern: ,"Be itflmownthat,- CHaRLns J. Pinnen, a'citizen of the United" States, and afresident of Toledo, in the county ofLucas and VState 'of Ohio, have made an `Invention Appertaining to VaiveGear;` and l dohereby declare the following to bea full, Clear, `and exact description of the invention,;such aswvill enable others skilled -in vthe arty to which lit appertains to make anduse 4the same, reference being had to the accompanying drawings, and' to the characters-of reference marked thereon, which form apart of this specification.

This invention relates to reverseygears, and particularly to thosey ofthefradial type for use in connection with the engine valves `of locomotives.

The object of the inventions to simplify lgearsY of the type-described heretofore lused and also to adapt them for operationentirely fromthe cross-'heads `instead of the drive wheel cranks of locomotives, thereby producing a radial type v,valve 'gearthat yis not subjected todistortionby the rise and fall ofthe engine, as is the casewith gears receiving their accelerated 'travel from the drivev wheel cranks.

rlhe invention is `fully described in the following specification,l and*` while, in its broader aspect, it iscapable vof embodiment in numerous forms, two embodiments only thereof are illustrated in the accompanying drawings, inwhich,-`

vFigure 1 is a fragmentary side-elevation of a locomotive equipped withmy* improved valvegear. F ig. 2 is arear elevationof the reverse mechanism `ofthe gear, with parts in sectionand parts removed. Figj is a side elevationthereof in forward motion Lposition. rFig;` i is a fragmentary vplan view `of the gear arrangement at bothsides Iof the locomotive and the connection therebetween'. Fig. 5 is a fragmentary side elevation of a locomotive with a differentform of-radial type valve? gear direct connected to a crosshead, and Figs.y 6,' 7 and 8 are different details thereof. y

Referring tothe drawings, 1 designatesv a locomotive frame, 2 the'd'rive wheels thereof, 3 an eiigiiiefcylinder, iithe-cross-head,

the rod 5 from which projectsinto ,the cyl- `thefvalve stem guide.

inder and connects with the The reverse mechanismfor the valve gear,

one of which is -loca'ted at each side of the locomotive, 1s -mounted lin a bracket or frame part 7 carried onthe cross-head guide yoke 8 and comprises a reverse-yoke 9 jour- -naled atthelendsof its arms in' the bracket bell-crank-lever 18 ,fulcrumed in the bracket 7 and connected atone endto the upper end of theradius-lever12., The radius-leverA 12 is yctm'nected atL its` lower end to the crosshead 4f by ra .union-rod 14, instead of being connected tothe'drive wheel crank,-as has heretofore been they custom. The upper endv ofthe reverse-'yoke 9 is connected by arod 15 to any suitable control means, as is well understood `in theart,lwhereby the reversevokermayv be shifted forward or backward atl the willy of the operator. The downwardly' extending `arm of the bell-cranklever 18 is connected by a radius-bar 16 -to ar rocker-arm 17 fixed to and projecting downward fromashaft 18which-extends entirely across the locomotive and is `jo'urnaled in suitable lbrackets 19. The shaft 18 atqthe oppositeside offthe'locomotive hasy an upwardly `projec'ting rocker armV 20, which is connectedbya radius-rod 21to the upper 'endfof ythegcombination-lever 22, avliichis carried Lby"the valye stem cross-'headA 23 mounted in the guide 6 of theassociated engine.

lThe reverse mechanism at the opposite side of the' locomotive to that above described'has 'its radius-bar 16 connected to a rocker-arm 24 projecting downward from the. `adjacent end of a hollow shaft25, which is sleeved on the shaft 1S and extends to ythe opposite lsidey of the locomotive, having at rsuchy side a downwardly extending rocker armQG, whichis lconnected by a radius-rod 2'? with the l'upper end ofthe combinationlever" 28"--carried by 1 the` valve-stem crosshead `23 of the associated engine* Each combination-leier 22,228 has its lower end connected to 4*the associated cross-head i by a union link'29if piston, and 6 l The operation of my improved valve gear is as follows: Upon a running` of the locomotive the cross-head 4 of each engine communicates a rocking movement to the connected radius-lever 12 around both its bearing in the radius-yoke 11 and the bearing of the radius-yoke in the reverse yoke 9, and this motion in turn rocks the'bell-cranklevers 13. The lever 13 at the right side of the locomotive, in the present instance, imparts a rocking movement to the cross shaft 18, which is connected at the opposite side oit the locomotive through the arm 20 and radius-rod 2 1 with the combination-lever 22 of the engine at that side, while the movement of the other bell-crank-lever 13 effects a rocking .of the hollow shaft 25, which in turn communicates a rocking movement to the combination-lever 28 at the right side of the locomotive through the rocker-arm 26 and radius rod 27. It is well understood in the art that the combination-lever for each engine receives its lap and lead movement from the cross-head of the associated engine and it receives its accelerated valve movement from the reversing mechanism at the opposite side of the locomotive.

One of the novel features ot my gear consists in connecting` the radius lever 9 of a reversing mechanism direct through links 12 and 14 to the cross-head instead of to the drive wheel crank at such side of the locomotive for imparting the accelerated motion to the valve of the engine at the opposite side ot' the locomotive, whereby the rise and fall of the locomotive on its springs has no distorting effect on the accelerated movement produced by the valve gear. In practice this is a very important i'eature, it being found that losses due to distorted valve gears lower the efiiciency of a locomotive at times as much as 30 per cent.

Another novel feature of the invention resides in connecting a reversing mechanism at one side of the locomotive to a combination lever, at the other side of the locomotive through respective shafts each having a pair of rocker arms with one connected to the operating reversing mechanism and the other to the upper end of the associated combination lever. This arrangement very materially simplifies the valve gear construction, reduces the number of parts, and permits easier application to old designs ot engines.

A slightly different form ot' radial type of valve gear from that above described and which is directly connected to and operated by the crosshead is illustrated in Figs. 5 to 8. In this form oit gear 30 designates the reverse-yoke, 31 the radius yoke and 32 the radius-lever all mounted and connected, as described in connection with the first form, and the radius-lever being connected to the cross-head by a union-link 34, whereby the reverse mechanism is operated trom the cross-head. rlhe upper end of the radius-lever is connected to a rockerarm projecting` from a cross-shaft 36, the opposite end of which is provided with a downwardly extending rocker arm that is connected by a link to the combinationlever at that side of the locomotive. The valve gear at the opposite side of the locomotive has its radius-lever connected by a rocker-arm to a cross-shaft 37, the near end of which carries a downwardly extending rocker arm 38 that is connected by a radiusrod 39 to the associated combination lever 40, the mounting and operation of which lever is the same as described in the other form of the invention. The specific form of this valve gear is claimed in a copending` application No. 443,742.

he term pradial type gear as used herein is commonly understood in locomotive practice as referring to valve gears in which the reversing means comprises a plurality of parts each mounted for rocking movements and having true pivotal, as distinguished from sliding,connection with each other.

l wish it understood that myA invention is not limited to any specilic construction, arrangement or form of the parts, as it is capable ot' numerous modifications and changes without departing from the spirit ot the claims. y

Having thus described my invention, what I claim as new, yand desire to secure by Letters Patent, is,- l

1. In a locomotive, the combination with an engine operated cross-head at each side and an engine valve at one side, of a lap and lead mechanism connected to the valve and to one cross-head, and a reversing mechanism of the radial type connected to the lap and lead mechanism and having its radius lever directly connected to and operated by the other cross-head.

2. 1n a locomotive, the combination with an engine operated cross-head at each side and an engine valve at one side, of a valve gear mechanism having a lap and lead means including a Heating combination lever connected to one cross-head and to the valve and having a reversing means of the radial 1,427,840 f 'a t ing combination lever connected to the valve7 ing connected to and having lap and lead a rocker arm on the shaft eonneeted to and movement imparted thereto from the other operated by the reverse mechanism, and a crosefhead. f y 10 second rocker arm on the shaft connected In testimony whereof I have hereunto to the upper end of the combinationlever signed Inyname to this; speeieation.

and imparting accelerated motion thereto, f I e n the other end of the combination lever be- CHARLES J. PILLIOD. 

